*
* Return: A pointer to the panel registered for the specified device tree
* node or an ERR_PTR() if no panel matching the device tree node can be found.
+ *
* Possible error codes returned by this function:
+ *
* - EPROBE_DEFER: the panel device has not been probed yet, and the caller
* should retry later
* - ENODEV: the device is not available (status != "okay" or "ok")